feature when you have a seemingly stuck socket and want to figure
out why it has not been closed yet.
No plans to MFC this, as it changes the netstat sysctl ABI.
Reviewed by: andre, rwatson, Eric Van Gyzen
EV_RECEIPT is useful to disambiguating error conditions when multiple
events structures are passed to kevent(2). The error code is returned
in the data field and EV_ERROR is set.
Approved by: rwatson (co-mentor)
When the EV_DISPATCH flag is used the event source will be disabled
immediately after the delivery of an event. This is similar to the
EV_ONESHOT flag but it doesn't delete the event.
Approved by: rwatson (co-mentor)
Add user events support to kernel events which are not associated with any
kernel mechanism but are triggered by user level code. This is useful for
adding user level events to an event handler that may also be monitoring
kernel events.
Approved by: rwatson (co-mentor)
The touch event filter is called when a kernel event data is possibly
updated. There are two hook points. First, during a kevent() system
call. Second, when an event has been triggered.
Approved by: rwatson (co-mentor)
TCP_SORECEIVE_STREAM for the time being.
Requested by: brooks
Once compiled in make it easily switchable for testers by using a tuneable
net.inet.tcp.soreceive_stream
and a corresponding read-only sysctl to report the current state.
Suggested by: rwatson
MFC after: 2 days
fixes their issues but one reports a failure in NFS ROOT. Revert
the change for now pending further investigation.
Reviewed by: bz
MFC after: immediately
and address aliases. After an interface is brought down and brought
back up again, those self pointing routes disappeared. This patch
ensures after an interface is brought back up, the loopback routes
are reinstalled properly.
Reviewed by: bz
MFC after: immediately
- In 8.x and above the run-queue locks are nomore shared even in the
HTT case, so remove the special case.
- The deadlock explained in the removed comment here is still possible
even with different locks, with the contribution of tdq_lock_pair().
An explanation is here:
(hypotesis: a thread needs to migrate on another CPU, thread1 is doing
sched_switch_migrate() and thread2 is the one handling the sched_switch()
request or in other words, thread1 is the thread that needs to migrate
and thread2 is a thread that is going to be preempted, most likely an
idle thread. Also, 'old' is referred to the context (in terms of
run-queue and CPU) thread1 is leaving and 'new' is referred to the
context thread1 is going into. Finally, thread3 is doing tdq_idletd()
or sched_balance() and definitively doing tdq_lock_pair())
* thread1 blocks its td_lock. Now td_lock is 'blocked'
* thread1 drops its old runqueue lock
* thread1 acquires the new runqueue lock
* thread1 adds itself to the new runqueue and sends an IPI_PREEMPT
through tdq_notify() to the new CPU
* thread1 drops the new lock
* thread3, scanning the runqueues, locks the old lock
* thread2 received the IPI_PREEMPT and does thread_lock() with td_lock
pointing to the new runqueue
* thread3 wants to acquire the new runqueue lock, but it can't because
it is held by thread2 so it spins
* thread1 wants to acquire old lock, but as long as it is held by
thread3 it can't
* thread2 going further, at some point wants to switchin in thread1,
but it will wait forever because thread1->td_lock is in blocked state
This deadlock has been manifested mostly on 7.x and reported several time
on mailing lists under the voice 'spinlock held too long'.
Many thanks to des@ for having worked hard on producing suitable textdumps
and Jeff for help on the comment wording.
Reviewed by: jeff
Reported by: des, others
Tested by: des, Giovanni Trematerra
<giovanni dot trematerra at gmail dot com>
(STABLE_7 based version)
we at least don't panic.
We don't really support dual role mode (INITIATOR/TARGET) any more. We
should but it's broken and will take a fair amount of effort to fix
and correctly manage both initiator and target roles sharing the port
database. So, for now, disallow it.
module tries to install the same address again. This extra code
is removed, which was discovered by the removal of a call to
in_ifscrub() in r196714. This call to in_ifscrub is put back here
because the SIOCAIFADDR command can be used to change the prefix
length of an existing alias.
Reviewed by: kmacy
within the system that owns the interface. Packets destined to
the local end point leak to the wire towards the default gateway
if one exists. This behavior is changed as part of the L2/L3
rewrite efforts. The local end point is now reachable within the
system. The inpcb code needs to consider this fact during the
address selection process.
Reviewed by: bz
MFC after: immediately
df(1) and mount(8) output. This is a bit smilar to OpenSolaris and follows
ZFS route of not listing snapshots by default with 'zfs list' command.
- Add UPDATING entry to note that ZFS snapshots are no longer visible in
mount(8) and df(1) output by default.
Reviewed by: kib
MFC after: 3 days
For some vague reason, it may be possible that scp->cursor_pos exceeds
scp->ysize * scp->xsize. This means that teken_set_cursor() may get
called with an invalid position. Just ignore the old cursor position in
this case.
Reported by: Paul B. Mahol <onemda gmail com>
MFC after: 1 month
1) A lock issue, if we ever had to try again
we would double lock the INP lock.
2) We were allowing (at wrap) associd 0... which really
we cannot allow since 0 normally means in most socket
API calls that we are wishing to effect something on
the INP not TCB.
MFC after: 1 week
by just returning EOPNOTSUPP. This will allow NFS server to fall back to
regular READDIR.
Note that converting inode number to snapshot's vnode is expensive operation.
Snapshots are stored in AVL tree, but based on their names, not inode numbers,
so to convert inode to snapshot vnode we have to interate over all snalshots.
This is not a problem in OpenSolaris, because in their READDIRPLUS
implementation they use VOP_LOOKUP() on d_name, instead of VFS_VGET() on
d_fileno as we do.
PR: kern/125149
Reported by: Weldon Godfrey <wgodfrey@ena.com>
Analysis by: Jaakko Heinonen <jh@saunalahti.fi>
MFC after: 3 days
OFW device tree for PCI bridges and add a new one for PCI Express.
While at it, take advantage of the former for the rman(9) work-
around in jbusppm(4).
the same entry twice. This bug is not fixed yet, but leads to situation
where when try to access corrupted directory the kernel will panic.
Until the bug is properly fixed, try to recover from it and log that it
happened.
Reported by: marck
OpenSolaris bug: 6709336
MFC after: 3 days
automatic link-local address configuration:
- Convert a sysctl net.inet6.ip6.accept_rtadv to one for the
default value of a per-IF flag ND6_IFF_ACCEPT_RTADV, not a
global knob. The default value of the sysctl is 0.
- Add a new per-IF flag ND6_IFF_AUTO_LINKLOCAL and convert a
sysctl net.inet6.ip6.auto_linklocal to one for its default
value. The default value of the sysctl is 1.
- Make ND6_IFF_IFDISABLED more robust. It can be used to disable
IPv6 functionality of an interface now.
- Receiving RA is allowed if ip6_forwarding==0 *and*
ND6_IFF_ACCEPT_RTADV is set on that interface. The former
condition will be revisited later to support a "host + router" box
like IPv6 CPE router. The current behavior is compatible with
the older releases of FreeBSD.
- The ifconfig(8) now supports these ND6 flags as well as "nud",
"prefer_source", and "disabled" in ndp(8). The ndp(8) now
supports "auto_linklocal".
Discussed with: bz and jinmei
Reviewed by: bz
MFC after: 3 days
The problem was introduced in SVN 180608/ rev 1.114 and affects
all users of callout_reset() (including select, usleep, setitimer).
A better fix probably involves replicating 'ticks' in the
struct callout_cpu; this commit is just a temporary thing so that
we can MFC it after a suitable test time and RE approval.
MFC after: 3 days
This is almost always pilot error.
We don't need to check for group filter UNDEFINED state at t1,
because we only ever allocate filters with their groups, so we
unconditionally reject such calls with EINVAL.
Trying to change the active filter mode w/o going through IP_MSFILTER
is also disallowed.
Deals with the case described in PR 137164 upfront, cumulative
with the fix in svn rev 197132 which only calls imo_match_source()
if the source address family was not unspecified.
PR: 137164
MFC after: 5 days
- Be prepared for dbuf to disappear in zfs_reclaim_complete() and check if
z_dbuf field is NULL - this might happen in case of rollback or forced
unmount between zfs_freebsd_reclaim() and zfs_reclaim_complete().
- On forced unmount wait for all znodes to be destroyed - destruction can be
done asynchronously via zfs_reclaim_complete().
MFC after: 1 week
* Don't try to use the source address, when its family is unspecified.
* If we get a join without a source, on an existing inclusive
mode group, this is an error, as it would change the filter mode.
Fix a problem with the handling of in_mfilter for new memberships:
* Do not rely on imf being NULL; it is explicitly initialized to a
non-NULL pointer when constructing a membership.
* Explicitly initialize *imf to EX mode when the source address
is unspecified.
This fixes a problem with in_mfilter slot recycling in the join path.
PR: 138690
Submitted by: Stef Walter
MFC after: 5 days
NULL, but also can point to dead vnode, take that into account.
PR: kern/132068
Reported by: Edward Fisk" <7ogcg7g02@sneakemail.com>, kris
Fix based on patch from: Jaakko Heinonen <jh@saunalahti.fi>
MFC after: 1 week
